... Area OSPF 91 Configuring OSPF: Mandatory Commands 91 Using Wildcard Masks with OSPF Areas 92 Configuring OSPF: Optional Commands 93 Loopback Interfaces 93 Router ID 94 DR/BDR Elections 94 Modifying ... Mode 195 Password-Recovery Procedures for Cisco Routers 196 Password Recovery for 296 0 Series Switches 198 Chapter 18 Cisco Discovery Protocol (CDP) 201 Cisco Discovery Protocol 201Chapter 19 Telnet ... Software and Configurations 185ii CCNA Portable Command Guide, Second EditionScott EmpsonCopyright© 2008 Cisco Systems, Inc.Published by: Cisco Press800 East 96 th Street Indianapolis, IN 46240...